package cn.lnl.springcloud.controller;

import cn.lnl.springcloud.entities.CommonResult;
import cn.lnl.springcloud.entities.Payment;
import cn.lnl.springcloud.lb.LoadBalance;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.context.annotation.Bean;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @author LNL
 * @date 2021/7/15 22:56
 */
@RestController
@Slf4j
public class OrderController {

    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";
    @Resource
    private RestTemplate restTemplate;

    //注入自定义的负载均衡
    @Resource
    private LoadBalance balance;

    //获取到当前注册中心的某个服务
    @Resource
    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }


    @GetMapping("/consumer/payment/createPost")
    public CommonResult<Payment> create2 (Payment payment) {
        ResponseEntity<CommonResult> entity = restTemplate.postForEntity(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()) {
            return entity.getBody();
        } else {
            return new CommonResult<>(500,"操作失败");
        }
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()) {
            return entity.getBody();
        } else {
            return new CommonResult<>(444,"操作失败");
        }
    }


    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

        //判断如果是否为有效的实例
        if (instances == null || instances.size() < 0) {
            return null;
        }

        ServiceInstance serviceInstance = balance.instances(instances);
        //返回的URI
        URI uri = serviceInstance.getUri();
        System.out.println(uri);
        return restTemplate.getForObject(uri+"/payment/lb", String.class);
    }



}
